Injector



Aug... 7, 1945. R. H. HANLN ET AL INJEG'I'OR 1943 2 sheets-sheet 1 Filed July 13 Aug. 17, 1945s.

R. H. H'ANLoN ETAL' 2,381,216

INJECTOR v Filed Julyvls, 1943 2 Sheets-Sheet 2 vPatented Aug. 7, 1945 INJECTOR Robert H. Hanlon and Fordyce B. Farnsworth,

Wadsworth, Ohio, assignors to The Ohio Injector Company, Wadsworth, Ohio, a corporation of Ohio Application July 13, 1943, serial No. 494,525

s1 claims. (ci. 1oz-27o) This invention rentes to injectors, and it has particular reference to the construction and operation of injectors of the non-lifting type for feeding water to steam boilers, especially thebollers of locomotives, whereby, by the actuation` of a-single control member, the control of admission of both steam and water to the injector, and the opening and' closing adjustment of the overflow, may be accomplished.

The principal object of the invention is to provide` an injector which will deliver vwater to the boiler'at the highest suitable temperature without .breaking, and which enables the injector to be operated at its minimum delivery capacity most oi' the time, the injector being, however, of a maximum capacity in excess of the water consumption rate of the boiler which it serves.

`"I'his is accomplished by an automatic adjustment of conditions obtaining within the injector during operation, as will hereinafter be explained, wherebyV an economy in the consumption of heat, and concomitantly of fuel, and of Water, is attained. Moreover, the boiler is not subjected to periodic introduction oflarge volumes of relatively cold water, and the head of steam ismore easily maintained because the water may be fed into the boiler at a substantially uniform, pre-- determined temperature. A

In'accordance with one aspect of the principle of the invention, the injector is operated as of the fixed steam inlet, adjustable Water inlet type, and as the combining chamber pressure is a determinable related function of the delivery teme perature, and the volume of water admitted to the injector affects the delivery temperature, and

the feed of steam remains constant; the pressure water at delivery is maintained substantially constant and the delivery volume is varied bycontrol of the-steam.

The invention comprises'amode of operation, and mechanism related thereto, whereby the objects and'principles of the invention may be most ing the injector and for insuring its continued operation in accordance with predetermined requirements, all as will be explained hereinafter more fully and finally claimed.

In the accompanying drawings illustrating the invention, inthe several figures of which like y parts are similarly designated,

effectively and conveniently accomplished, in-

cluding .steam control valve'means and means functioning automatically in response to operation of such steam control valve means for starte- Fig. 1 is a schematic sectional side elevation of an injector and control means associated therewith embodying the principle of the invention in a preferred form.

Fig. 2 is an enlarged sectional side elevation of a check valve employed in the control means.

Fig. 3 is a graph showing operating characteristics of injectors in accordance with the embodiments of the invention, and

Fig. 4 is a view similar to Fig. l, but on a smaller scale, illustrating a modification in which independent inlets are provided for steam admitted to the forcing steam nozzle and lifting steam nozzle of the injector, respectively, and whereby anadjustable steam inlet, automatic water inlet, in-V jector is provided, in which the delivery `temperature of the water may be maintained substantially constant.

Referring to Figs. 1 and 2, it will be, understood that the injector has a body l of conventional form having the customary set of tubes (not usual orifice for conducting steam to prevent freezing of the water in cold-weather.

As vis customary in injectors of this type, the delivery 5 leads to the delivery chamber in the lower end 8 of the injector body, and the overflow 6-1 communicates with the combining chamberv located in .the mid-portion 8 of the body.

Located preferably within the locomotive cab within easy reach of the engineman, is the steam throttle valve having a body Il) piped by suitable connections (not shown) to the steam passage 2 of the injector body, so that steam entering the steam inlet l i and controlled by the throttle valve may be conducted to the steam passage 2. The

steam valve comprises a main valve disk I2 seating upon a removable seat-piece I3, and having an apertured shell I4 enclosing an auxiliary or primer valve disk l5 having a limited axial movement within the shell I4 under the influence of a 0f a control. lever or handle 20 pivoted at 2I-'in bearing elements 22 oistanding from the valve body. The link I8 is slotted at I8' to provide a lost motion connection which will be explained later.

vThe bearing sleeve 23 of the lever 28 is provided with a cam projection 24 adapted, in certain positions of the lever 28, and hence of the steam valve means I'2--I5, to cooperatively engage, and depress to open position, the stem 25 of a spring-seated control valve 26 to which steam is conducted from the valve body Il) through a passage 21.

It will be noted that the operation of the valves` I2, I5 and 26 is thus responsive to movement of the lever upon itsv pivot 2|, and that there are four critical positions of the lever to which operation of the injector is in turn responsive, as indicated by the lines A, B, C and D, Fig. 1, as will appear hereinafter in the description of the operation of the injector. It will be noted, also, that valve-opening movement of the lever 20 is limited by .cooperating stops 28 and 29 carried by the brackets 22 and lever 29, re-

spectively. v

The overow passage 1 is provided with an automatic overflow valve comprising a body 30 having a main valve disk 3| seating at 32 in the body 30 and biased to closed position by a spring injector will begin to function.

33, and an auxiliary valve disk 34 seating within the disk 3| at 35 and biased to closed position by a spring 36. Opening and closing movement of the valve disks 3l and 34 is guided by a spider 31 on the main disk 3l and a stem 38 carried by the body cap 439, and it will be apparent from the construction illustrated that a limited opening movement of the valve disk 34 is possible before the iiange 48 of its hollow stem picks up the cooperating abutment member 4l of the cage 42 `of the main disc 3l to impart to it desired opening movement.

Opening of the overflow valve by unseating of "the disks 3l and 34 is accomplished by the rod 43 of a piston 44 working in a cylinder 45, the piston and cylinder being provided with ports 46, 46a and 46h. Steam is admitted to this cylin- 'der 45 beneath the piston 44 through a piped connection 41 to the outletport 48 of the valve 26, as will later appear.

The water valve is similar in construction to the overiiow valve, and includes a main valve disk 49, and an auxiliary valve disk 58 biased to its seat in the main disk byaiseating spring 50'. The main disk may be held to seated position, and its opening movement limited, by a `manually adjustable screw threaded stem member 5I carrying an abutment 5I'.

Opening movement is imparted to the auxiliary valve disk 58 and therethrough tothe main valve disk 49 by the rod 52 of a'piston 53 working in a cylinder 54 provided With relief ports or vents 55, under the iniiuenceof pressure fluid admitted to the cylinder 54 beneath the piston 53 through a piped `connection 56 to the injector body in the zone` of the combining chamber. This piped connection'56 includes a check valve 51 the disk 58 of which is provided with a leakage port 58 (Fig. 2)l for' a purpose hereinafter appearing. The piped connection I58 is also in communication with the piped connection 41 by way of a check valve 68 and branch pipe 68'. The check valves 51 and 60' open in the direction of the arrows appearing upon them.

The operation of this embodiment of the invention (Figs. V1 and 2) is substantially as fol-'l lows: As` hereinbefore stated, there are four critical positions, A, BC and D, of the lever 28, to which operation of the injector is particularly responsive. When the lever 28 is in the position A,as shown in Fig. l, all of the injector valves 3|, 34, 49 and 58 and the steam throttle and control valves I2, I5 and 26, are closed and the injector is out o f operation. With the lever 2li in position B, the control valve 28 is opened but the steam throttle valve I2- I5 remains closed due to lost motion aiorded bythe slot I8. When lever 20 is in position C, control valve 26 is stillv open and primer disk I5 is full open and in position to pick up and open main disk I2. With lever 20 in position D, control valve 26 is closed and I2 and I5 are in full open position.

Hence when the lever is in position B, the injector is not functioning, but steam passing control valve 26 fllls the pipe connections 41 and and thus causes the pistons 44 and 53 in cylinders 45 and 54, through their rods 43 and 52, to open overflow valves 34-32 and Watenvalves ii-. Thus the njector body is permitted to fill with water` wh ch spills at overflow 6.

I Upon movement, now, of the lever 20 to position C, control valve 26 still being held open and throttle valve I 2-I5 being partially open, the Also, as check valve 51 closesagainst steam flowing into pipe connection 56 from 41 throughcheck valve 68, no steam can flow to the combining chamber 9 of the injector body except through the leakage port v590i disk 58 of this check valve 51, which port is preferably about 312" diameter.

In this it is to be assumed that water valve disk 49 is held seated by stem .5I but that the auxiliary water valve disk50 is free to open under the influence of steam in cylinder 54 acting on piston 53.

When the lever 29 is moved from position C to position D, the throttle valve I2-I5 is fully opened, control valve 26 is permitted to close under the influence of its spring, and leakage of steam through ports 46, 46a and I461) from cylinder 45 will permit overow valve 3I34 to close.

With the water valve 49 manually adjusted by the means 5I5I for minimum grading, the nJector is now in condition to function with full automatic control of the water inlet valve in the following manner: This auxiliary Water valve having been held open by steam at boiler pressure, say 250#, acting on piston 53 in cylinder 54, it must, when steam is cut oi from cylinder 54, try to establish itself ata running posivtion by seeking to close under the iniiuence of influence ofr the pressure-responsive piston '53 and counteractingspring 50", the force exerted by the latter being 'of a predetermined appropriate value. l

' 'Revertingto the opening of the overowvalve 3l-35 when the lever 20 is in position to open valve 26'and. admit steam to pipe connection 41 it is apparent that the steam enters cylinder 45 A below piston 44, and, asthis piston has a greater I effective area thanvauxiliary valve 34, it will be operative to raise the valve 34 against the pressureV of spring 36 even though the'pressure in the injector body surrounding the valve 34 is equal to that of the steam admitted below the piston I44. This results in venting the injector body to atmosphere through the loverflow opening 6, and the overflow valve 3l can risefrom its seat under the opening influence ofthe parts 40 and4l carried by the hollow vstem of the v valve cannot open because the pressure in cylinder 54 below the piston 53 and that above the Water valve 49 is the same and the Water valve is biased to close'by spring 50'. Thus, although pressure from the combining chamber may pass through check valve 51 and pipe connection 56. to cylinder 54, the vwater valve 50 will not open. and, leven `if the boiler check sticks shu't so lthat Water from the delivery cannot enter the boiler, waterjand steam will not vblowbaek throughthe injector into 'the water tank. u i

If, however, the` injector breaks With the Water valve 49 open, the balance of pressures will in nol Way be eilective, but blow-back into the tank will be prevented by the check valve-in vwere omitted, pressure from the combining cham` ber could pass throughv check valve 51 and the branch pipe 60 into connection 41, and thence to cylinder 45, and they overflow valve would be opened by piston 44 the eiectivearea of .which is greater than that of the auxiliary valve 34, as hereinbefore stated. Y

Referring to the graph, Fig. 3, taken in kconnection with the foregoing description, it `will be seen that the injector provided with the control meansof the invention may be graded by the engineman, by manual adjustment of the extent of openingv movement of the main Water valve 49, between-maximum delivery of 10,000 gals. .per

When the injector is in normal operation, at delivery temperatures of 270 F. and less, the auxiliary valve 50 will be inoperative kandall water will enter by way of valve 49. When, however, delivery falls below 5,500 gals. per hr. and the temperature at delivery tends to risefabove thev practical 27.0 F. to 275 F. range, the auxiliary valve 50 will come into operation due to increased combining chamber pressure, as determined by spring 50', and thereafter the delivery will be maintained `at approximately the desired optimum of 5,500 gals. per hr. at 270 F. In consid-v ering the foregoing quantities and temperatures of delivery, it should be remembered that, as already stated, the injector is operated upon the principle of fixed steam inlet, adjustable water inlet.

It has been lfound that, in accordance with the principle of the invention, an injector may be provided with controls which. will make possible the maintenance of a substantially constant dehr. at 180 F. and l5"`vac. in the combining, n

explained.

livery temperature, preferably below a predetermined maximum, with adjustable delivery volume.

This is done,- in combination with automatic control of the overiiow valve and water valve, by providing` for utilization of the steam for admission separately 'to the forcing steam nozzle and the lifting steam nozzle of the injector tubes. Such a modified arrangement is illustrated in Fig. 4.

In this embodiment, the usual form of lifting steamv nozzle is replaced by a mere shell 6l which acts more as a guide than an orifice, for the reason that`it is not necessary that it have the throttlingeffect ofthe customary lifting steam nozzle, as will later appear, and steam is conducted to it through the steam passage 2. The forcing steam nozzle B2 is of more conventional form, but instead of yreceiving steamby way of the passage 2, as is customary, is provided with a separate steam passage 2 in axial alignment with-it at thetop of the injector body l.

Steam for both the forcing nozzlev 62 and lifting nozzle 6l is initially controlled by the main throttle valve l0 which is in the form hereinbefore described, but an auxiliary control for the lifting steam is provided by means of a manually adjustable, automatically actuated, steam valve 63 interposed between the throttle valve I0 and the steam passage 2 leading to the lifting steam nozzle 6|. This valve 631s shown vas of globe-valve type and includes a valve disk 64 seating inthe septum 65 and provided with a stem carrying a piston 36 working iny a cylinder 61 which is conneeted by a branch V68 with the pipe connection 41'leading from the control valve 26. A manually adjustableabutment member 69 limits the extent of openingof the disk' 64 by coaction with the piston 66 carried by the disk.

A check valve 51 similar tothe check valve 51 is interposed in the branch 68 for a purpose later 4 The water valve 10 is fully automatic, and includes a valve disk 1I having a seat 12 adjacent to the water passage 4 and guided by a lower stem 13 passing through a spider 14 in the valve body and an upper stem 15 telescoping 'within a downward extension 16 of a piston 11 working in-a cylinder 1B at the top ofthe valve body. The lower stem 13 vof the disk 1l is normally engaged by the rod 19 of a piston 80 working in a cylinder 8| at the bottom of the valvev body, in much the same manner as the arrangement disclosed in the embodiment of Fig. 1.

Steam is conducted from the control valve 26 to the cylinders 'I8 and 8l through branches 41a and 41h, respectively, of the pipe connection 4l leading from such control valve. The piston 80, valve disk 'Il and piston 'Il are successively of gradually increasing eifective area.

The overflow valve 30 is preferably the same in construction as that described in the embodiment of Fig. l, and steam reaches its cylinder 45 through a branch llc of the pipe connection 4l leading from the control valve 26.

The set of combining and delivery tubes (not shown) of the injector are of conventional form and have the property of functioning either with the admission of steam through the forcing steam nozzle 62 alone, or with steam admitted through both the forcing Asteam nozzle and the lifting steam nozzle 6 I.

In order to have the injector function with the admission of forcing steam alone, it is necessary to regulate the admission of water through the water valve 10, and the lembodiment of Fig. 4 embraces this principle.

The foregoing characteristics, and the fact that the overflow valve and the main steam throttle valve, and their adjuncts, are preferably the same as those of the embodiment of Fig. l, should be kept in mind in connection with the following description of the operation of the modication illustrated in Fig. 4. Also the check sired temperature, say 250 which is a practical operating temperature. By adding steam through the lifting steam nozzle 6i and adjusting the Water valve 'l to suit this increase in steam admitted, it has been found that the water delivery capacity of the injector may be doubled while still maintaining the same delivery temperature, or the injector may be adjusted to any intermediate capacity while still holding the same delivery temperature. This characteristic of operation is indicated by the broken line in the graph, Fig. 3,

In starting the injector, the lever Z is moved to position B, Fig. l, the priming position, Whereby the control valve 2B is opened but the throttle valve lZ-l remains closed. Steam flowing past the valve 26 through pipe connection 41 and branches 41e, lill), 41a and 88 acts to open overflow valve 3l! and Water valve '10, loads piston 'H to cause it to eri-gage stop shouldeor 'Il' to thus restrict such opening of the water valve (extent of movement a being less than b) and loads the piston 66 of lifting steam valve S3 to hold the same closed.

Further opening movement of the lever Z!) passes steam from the throttlevalve I2-l5 to the forcing steam nozzle 62, and when the throttle valve is in'full open position and the control valve 26 has, therefore, closed, the steam in pipe connection lil and its branches will leak out through ports 46, 46a and 4Gb of cylinder 45 and its piston 44, thus permittingvthe overcW valve to close and the lifting steam valve 63 to open to admit steam to the lifting steam nozzle 6l, the opening movement of the valve 63 being retarded by leakage of the steam trapped in its cylinder G1 through the leakage port of the check valve 5T', thus avoiding opening of thesteam valve 64 prior to closing movement of the Water valve 1| to its appropriate governing position. Also, 'Steam having been exhausted from cylinder 18,:and'steam trapped between the `check valves 51 and 6D having leaked through the port 59 in disk 58 of valve 51 into the combining chamber of they injector, the water valve disk 1| will be permittedto float in its proper governing position responsive to pressure entering cylinder 8l from the combining chamber balanced by the spring which loads the valve disk 1 I. Thus, again reverting to the principle that the combining chamber pressure is a determinable related function of the delivery temperature, and that the volume of water admitted to the injector affects the delivery temperature, the feed of steam being constant, it has been determined not only that the combining chamber pressuremay be utilized -tocontrol the water inlet valve to maintain the delivery temperature constant, but that as the combining chamber pressure is increased or decreased by increasing or decreasing the feed of steam to the lifting steam nozzle 6I, the feed of water to and vvolume of delivery from the injector may be increased or decreased in response to such pressure changes, and theA delivery temperature maintained substantially constant.

It should be borne in mind, in considering the operating characteristics of the injector in both of the forms disclosed, that the ranges of temperature,y pressure and delivery volume are predicated upon what may be considered normal or standard inlet, or tank, water temperature.

Various changes and ymodifications are considered to be Within the principle of the invention and the scope of the following claims.

What We claim is:

l. In injectors the bodies of which are provided with appropriate water tube means and steam nozzle means, and means including valves for controlling the admission of Water and steam, respectively, means for controlling actuation of the water valve to open said Water valve in response to actuation of the steam valve control means and during functioning .of the injector to maintain said water valve in an open condition the effective extent of which is governed in response to pressure conditions obtaining within the injector body.

2. In injectors the bodies of which are provided with appropriate water tube Ymeans and steam nozzle means, and means including valves for controlling the admission of Water and steam, respectively, means for controlling actuation of the Water valve to automatically open said water valve in response to actuation of the steam valve control means and during functioning -of the injector to maintain said water valve in an open condition the effective extent of which is automatically governed in response to pressure conditions obtaining within the injector body.

3. In injectors the bodies of which are provided With appropriate Water tube means and steam nozzle means, and means including valves for controlling the admission of water and steam, respectively, and for controlling overflow, means for controlling actuation of the water valve, and means for controlling actuation of the overflow valve, said Water valve controlling means and said overow valve controlling means serving to open said Water and overflow valves respectively in response to actuation of the steam valve control means, said water valve controlling means operating during functioning of the injector to -maintain said water valve in an open condition the effective extent of which is governed in respouse to pressure conditions obtaining within the .injector body, said overflow-'valve actuating means operating toclose the overflow valve when said. steam admission valve is actuated to admit Vsteam. to the injector for full functioning.`

.ft-@In injectors the bodies .of which are provided '.-Witli appropriate waterl tube means and steam nozzle means, and means including valves for controlling the admission of water and steam,

f opencondition the effective extent of which is automatically governed inresponse to pressure conditions obtaining within the injector body,

l said overflow valve controlling means operating to automatically close the overflow valve when said steam admission` valve is actuated to admit steamto the injector for full functioning.

, v5. In combination with an injector having a body provided with appropriate watertubes `and steam nozzles,l and means including fluid-pressure actuated valves for controlling the admission of Water to the injector and for controlling overflow, respectively, and valve means yfor controlling admission of steam to said tubes and nozzles, a single means for effecting control of all of said valves.

6. In combination-with an injector having al body provided with appropriate water tubes and steam nozzles,`and meansvincluding valves-fol' controlling the admission'ofwater and steam to said tubes and nozzles, respectively,y and for 'controllingoverflow, a single means for effecting control of -all of said valves, and means operative during functioning of the injector to maintain said water valve in an open condition the effective extent of which is governed in response to pressure conditions 'obtaining .within the injector body.

7. In combination with an vinjector havingl a body provided with vappropriate water tubes and steam nozzles and a combining chamber adjacluding valves rfor controlling the admission Vof water and steam to said tubes and nozzles, rei 'spectiveljo and for controlling overilow,fa.single meansA for effecting control of all of said valves, and means Loperative during functioning of the injector to maintain said water valve in an open condition the effective. extent of `Which is governed by pressure conditions obtaining Within said combining chamber.

8. In combination with an injector having a body provided with appropriate water tubes and steam nozzles, and means including valves for controlling the admission of water and steam to said tubes'- and nozzles, respectively,v and for controllingove-row, an operating member for opening 'and closing said steam valve, means including a control valve functioning in response to actuationof said steam valve operating member, and' pressure responsive means operatively associated withrsaid water Valve and overflow valve, respectively, and in communication with saidcontrol valve to receive a pressure fluid controlled thereby, whereby upon actuation of said steam valve operatingmem'ber, in startingv the 'cent to certain of said tubes, andr means in-v injector, said control valve will be actuated to effect luid pressure openingof said water valve and overflow valve, and afterl starting and during running rof the injector said'control valve will Y be actuated to interruptnow of pressure fluid -saidtubes and nozzles, respectively, and for con` trolling overflow, an operating member for opening and-closing said steam valve, means including,v a control valve functioning yin response to actuation of said steam valve operating member, pressure yresponsive .means operatively associated with said water valve and overflow valve, respectively, and in communication withvsaid control `valve to receive a pressure fluid controlled thereby, and means affording communication between the pressure responsive means associated with said water valve yand a press-ure Zone within the `injectorbody,whereby upon actuation of said steam valve operating member, in starting the injector, said control valve will be actuated to effect fluid pressure opening of'said water valve and overflow valve, andafter starting and during running of the injector'said control valve will be actuated to interrupt flow of pressure fluid and permit; closing of; vsaid overow valve and running adjustment of said water valve under the influence of pressure. conditions obtaining-in said pressure zone.. l

1Q; In combinationv with aniniector having a body provided with. appropriate Water tubes, a forcing, Steam IlOZzle, av lifting steam nozzle, and means including `valves for controlling the admission yof water and steam to said tubes and nozzles, respectively, and for controlling. overow, and a separate valve for controlling the admission of steam to said: lifting steam nozzle an operating member .for .opening and Closing, Said `first Inontioued steam valve, means including 'a1 control valvev functioning in response to yactuation of said steam valve operatingmember, and. pressure responsive mea-ns operatively associated with said waterv valve, i overflow valve and lifting steam valve, respectively, and in communication with said control valve to receive a pressure uid controlled. thereby, wherebyupon actuation of saidv steam valve operating, member, in startingthe injector; Said control. valve'will be actuated to effect fluid. pressure opening of Said water val-Ve and; overloW valve, andv closing of said lifting steamvalve; and after starting and during running of the injector saidv control valve will be actuated toV interrupt flow of fluid pressure and permit-closing of said overow valve, opening of saidliftlng steam valve,- and running adjustment of said water valve.

v1:1. In combination with an injector having a bod-yprovided with appropriate water tubes, a

f valvefunctioning in responseto actuationcf said steani valve operating member, and pressure responsive `n ieans operatively associated with' said water valve, overflow valve and lifting steam valve, respectively, and in communication with said control valve to receive a pressure fluid controlled thereby, the pressure responsive means associated with said water valve comprising separate means including members having different effective pressure areas tending lto exert forces for opening and closing movement, respectively, upon said valve, whereby upon actuation of said steam valve operating member, in Starting the injector, said control valve will be actuated to effect fluid pressure opening of said water valve and overflow valve, and closing of said lifting steam valve, and after starting and during running of the injector said control valve will be actuated to interrupt flow of fluid pressure and permit closing of said overflow valve, opening of said lifting steam valve, and running adjustment of said water valve.

12. In combination with an injector' having a body provided with appropriate water tubes, a forcing steam nozzle, a lifting steam nozzle, and means including valves for controlling the admission of water and steam to said tubes and nozzles, respectively, and for controlling overflow, and a separate valve for controlling the admission of steam to said lifting steam nozzle, an operating member for opening and closing said first mentioned steam valve, means including a control valve functioning in response to actuation of said steam valve operating member, pressure responsive means operatively associated with said water valve, overflow valve and lifting steam valve, respectively, and in communication with said control valve to receive a pressure fluid controlled thereby, and means affording communication between the pressure responsive means associated with said water valve anda pressure zone Within said injector body, whereby upon actuation of said steam valve operating member, in starting the injector, said control valve will be actuated to effect fluid pressure opening of said water valve and overflow valve, and closing of said lifting steam valve, and after starting and during running of the injector said control valve will be actuated to interrupt ow of fluid pressure and permit closing of said overflow valve, opening of said lifting s-team valve, and running adjustment of said water valve -under the influence of pressure conditions obtaining within said pressure zone.

13. In combination with an injector having a body provided with appropriate water tubes, a combining chamber adjacent to certain of said water tubes, a forcing steam nozzle, a lifting steam nozzle, and means including valves for controlling the admission of water and steam to said tubes and nozzles, respectively, and for controlling overflow, and` a separate valve for controlling the admission of steam to said lifting steam nozzle, an operating member for opening yand closing said first mentioned steam valve, means including a control valve functioning in response to actuation of said steam valve operating member, pressure responsive meansoperatively associated with' said Water valve, overflow valve and lifting steam valve, respectively, and in communication with said control valve to receive a pressure fluid controlled thereby, and means affording communication between the pressure responsive means associated with the water valve and said combining chamber, whereby upon actuation of said steam valve operating member, in starting the injector, said control valve will be actuated to effect fluid pressure opening of said water valve and overflow valve, and closing of said lifting steam valve, and after starting and during running of the injector said control valve will be actuated to interrupt, flow of fluid pressure and permit closing of said overflow valve, opening of said lifting steam valve, and running adjustment of said Water valve under the influence of pressure conditions obtaining within said combining chamber.

14. In combination with an injector having a body provided with' appropriate water tubes and steam nozzles, and means including valves for controlling the admission of water and steam to said tubes and nozzles, respectively, and for controlling overflow, a single means for effecting control of all of said valves, means operative during functioning of the injector to maintain said water valve in an open condition the effective extent of which is governed in response to pressure conditions obtaining within the injector body, and means for manually 'adjusting the eX- tent of opening of said Water valve to thereby adjust the volume of delivery of the injector.

15. In combination with an injector having a body provided with appropriate water tubes, a forcing steam nozzle, a lifting steam nozzle, and means including valvesr for controlling the admission of water and steam to said tubes and nozzles, respectively, and for controlling overflow, and a separate valve for controlling the admission of steam to said lifting steam nozzle', an operating member for opening and closing said first mentioned steam valve, means including a control valve functioning in response to actuation of said steam valve operating member, pressure responsive means operatively associated with said water valve, overflow valve and lifting steam valve, respectively, and in communication with said control valve to receive a pressure fluid controlled thereby, whereby upon actuation of said steam valve operating member, in starting the injector, said control valve will be actuated to effect fluid pressure opening of said water valve and overflow valve, and closing of said lifting steam valve, and after starting and during running of the injector said control valve will be actuated to interrupt flow of fluid pressure and permit closing of said overflow valve, opening of said lifting steam valve, and running adjustment of said Water valve, and means for manually adjusting the extent of opening of said lifting steam valve to thereby adjust the volume of delivery of the injector.

16. Control means for an injector having a body provided with appropriate .water tubes and steam nozzles, andrmeans including valves for controlling the admission of water and steam to said tubes and nozzles, respectively, and for controlling overflow, including pressure responsive means for moving the water valve and overflow valve to open condition, in starting the injector, means for controlling the supply of pressure fluid from a source thereof to said pressure responsive Imeans, and a singlemember operable to control the valve for admission of steam to said steam nozzles and to actuate the means for controlling the supply of pressure fluid to said pressure responsive means.

17. Control means as claimed in claim 16, in which the means for controlling the supply of pressure fluid to said pressure responsive means includes a valve which opens and closes in response to predetermined positions of said steam valve controlling member in its movement to control tlie admission of steam to said nozzles.

18. Control means as claimed in claim 16, in

pliedthrough said supply cori-trolling means from Athewnriain source `ofy steam supplied "to fthe' `in-y 'J'ectvriif H'19.' Control means as claimed in claim iii,v in which the valve for admissionl of steam'tothe injector nozzles includesfan auxiliary valve member-directly moved to open' and'c'lo-sed position in response to movement of said single control member, and a main valve member movable in response to movementl of the auxiliary valve member but provided with a lost'motion connection therewith, said means forl controlling the supply of pressure Cil fluid to said pressure responsive means being held by said single control member in open position while said main steam valve member is closed to thereby permit automatic starting'adjustment of said overflow and water valves and while at the same time said auxiliary valve member 1s open, and being closed when said main valve member is open to permit closing of said overflow valve and automatic running adjustment of said water valve.

, 20. Control means for an injector having a body provided with appropriate water tubes and steam nozzles, and a combining chamber adjacent to certain of said waterv tubes, and means including valves for theadmission of water and steam to said tubes and nozzles, respectively, and for controlling overflow, including pressure responsive means formoving the waterv valve and overflow valve to open condition, in starting the injector, means for controlling the supply of pressure fluid from a source thereof to said pressure responsive means, means of communication between the pressure responsive means of the water valve and said combining chamber, and a single member operable to control thel valve for admission of steam to said steam nozzles and to actuate the means for controlling the supply of pressure uid from said source to said pressurev responsive means.

2l. Control means as claimed in claim 20, in which the pressure fluid connection to the pressure responsive means of said overow valve 1s branched to the pressure responsive means of said water valve through the means of communi'- cation thereof with said combining chamber, and

means is interposed in said branch to prevent flow of pressure from said combining chamber to the pressure responsive means of said overflow valve.

Y 22. Control means as claimed in claim 20, 1n which the pressure fluid connection to the pressure responsive means of said overflow valve is branched to the pressure responsive means of said water valve through the means of communication thereof with said combining chamber, and check valve means is interposed in said branch to prevent flow kof pressure from said combining chamber to the pressure responsive means ofsaid overflow valve.

" 23. Control means as claimed in claim 20, in which the means of communication between the pressure responsive means of the water valve and said combining chamber'is provided with means to restrict back flow of pressure fluid from said pressure responsive means of the water valve to the vcombining chamber.

24. Control means as claimed in claim 20, in

which the means of communication between the f pressure responsive means of the water valve and saidcombining chamber is provided with check valve means to restrict back flow of pressure iluidifrom said pressure responsive means of the water valve to the combining chamber.' i

"25. Controlmean'sV as claimed in claim' 20, in which the means of communication between the pressure responsive means Aof the water valve and said combining chamber is provided with a r`check valve providedwith a leakage vport to restrict 26. Control means as claimed in claim 20, in

which the pressure iiuid connection to the pres-v sure responsive means of said overflow valve is branched to the pressure responsive means of said watervalve through the means of communication thereof with said combining chamber, and means is interposed in said branch to prevent ilow of pressure from said combining chamber to the pressure responsive means of said overow valve, and additional vmeans is interposed inthe means of communication between the pressure responsive means of the water valve and the combining chamber to restrict flow of pressure iiuid from said source to said combining chamber. 27. lControl meansas claimed in Claim 20, in which the pressure fluid connection to the pressure responsive means of said overow valve is branched to the pressure responsive means of said water valve through the means'of communication thereof with said combining chamber, and means is interposed in said branch to prevent ow of pressure from said combining chamber to the pressure responsive means of said overflow valve, and'additional means is interposed in the means (of communication between the pressure responsive means of the water valve and the combining chamber to restrict flow of pressure uid from said source to said combining chamber, the second-named means comprising a check valve provided with a leakage port.

28. Control means for an injector having a` cluding valves for controlling the admissionv of water and steam to said tubes and nozzles, respectively, and a valve for additionally controlvling' admission of steam to said lifting steam nozzle, and an overflow valve, including pressure responsive means for moving the water valve and overflow valve to open condition and the lifting steam valve to closed position, in starting the injector, means for controlling the supply of pressure fluid from a source thereof to said pressure responsive means, and a single member operable to control the first-named valve for admission of steam to said nozzles and to actuate the means for. controlling the supply of pressure fluid to said pressure responsive means.

29. Control means as-claimed in claim 28, in which the pressure responsive means for said water valve includes a pressure responsive'element serving, upon starting of the injector, to limit opening movement of the water valve.

30. In a steam operated injector adapted for eicient operation at a delivery temperature not exceeding a predetermined maximum, and in n which the delivery temperature and the combinsubjecting such pressure responsive means to pressure obtaining in the combining chamber.

3l. In a steam operated injector adapted for efficient operationV at a delivery temperature not exceeding a predetermined maximum, and in which the delivery temperature and the combining chamber pressure are, fundamentally, related functions, means for maintaining the delivery temperature substantially constant, and approx imating the predetermined maximum, While varyu 

